* expr.c (store_constructor): Fix test for missing array elements.

From-SVN: r11869

diff --git a/gcc/expr.c b/gcc/expr.c
index f539b49..278cfb3 100644 (file)
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -3488,7 +3488,10 @@ store_constructor (exp, target, cleared)
              if (mostly_zeros_p (TREE_VALUE (elt)))
                zero_count += this_node_count;
            }
-         if (4 * zero_count >= 3 * count)
+         /* Clear the entire array first if there are any missing elements,
+            or if the incidence of zero elements is >= 75%. */
+         if (count < maxelt - minelt + 1
+             || 4 * zero_count >= 3 * count)
            need_to_clear = 1;
        }
       if (need_to_clear)